Typewriting machine



Dec. 2, 1930. O DEGENER 1,783,604

TYPEWRI'I'ING MACHINE Filed Feb. 11, 1928 fim VIII/I1 4 17 Patented Dec. 2, 1930 UNITED STATES PATENT OFFICE GUSTAVE O. DEGENER, OF BROOKLYN, NEW YORK, ASSIGNOR TO ROYAL TYPENVRITER COMPANY, INC, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK TYPEWRITING MACHINE Application filed February 11, 1928. Serial no. 253,673.

The present invention relates to an improvement in type actions wherein the key lever is disconnected from the remainder of the type action as the type bar approaches the printing point so that the type bar completes the remainder of its movement by momentum and may return immediately to normal position whether or not the key lever is released. This permits the force of the 10 rebound of the type bar to be utilized for returning the same to normal position and permits a lighter return spring, thus producing a lighter key action. This speedy and immediate return of the type bars also tends to prevent any interference between successively operated type bars. Details of the invention will be apparent from the following description and the appended claims.

In the drawings:

Figure 1 is a fore and aft section through the typewriting machine showing the type actions in elevation, one type action being shown in normal position and another in operated position.

Figure 2 is a side elevation showing the type bar returned to its normal position while the key lever is held depressed;

Figure 3 is a sectional view of a detail.

This invention is applicable to any type of machine and there is illustrated merely a portion of the platen A, platen carriage B, and shift frame C. The type bars D are pivoted on the usual pivot wire (Z and links E connect the type bars to front links F pivoted in the usual manner, said front links having the usual links G pivotally connected thereto. These parts are illustrated in the form in which they appear in the Royal standard machine, but the invention may be embodied in machines which difier in the specific relation of these parts.

The other end of the links G are pivoted to sub-levers 1 mounted on a pivotal rod 2 carried by a frame member 3. The front end of each of these sub-levers has an olfset hook or bend 4 which, when the parts are in normal position, is adapted to engage under a similar offset hook 5 on one arm 6 of a short bell crank lever or latch pivoted to turn about an axis 7 on the key lever 8 which is provided with a finger piece 9 and is pivoted on the pivotal rod 2. A spring 10 attached at one end to the key lever and at theother end to an anchorage 11 tends to return the key levers to normal position.

Each key lever has a forwardly and downwardly projecting extension 13 adapted to be guided in a comb 1 1 and contacting with a resilient stop 15 when the key lever reaches its limit of downward movement. A spring 16 coiled about the pivot 7 of the bell crank lever normally tends to hold this bell crank lever in the position shown'in Figure 1 in which the upper end thereof is urged toward the front of the machine so that the hook 5 engages the hook 4E. The forward end of the bell crank lever has an offset 17 which is adapted to engage with a comb or fixed abutment 18 in the downward movement of the key lever. WVhen the parts are in the position shown in Figurejl, it will be noted that the offset 17 has just contacted with the comb 18. As the key lever continues its further movement, the bell crank is compelled to turn about the axis 7 and this produces a relatively rearward move ment of the hook 5 from the hook 4: on the sub-lever, releasing the latter and allowing the type action to complete the remainder of its movement by momentum and to return to the normal position shown in Figure 2 even if the key lever is held fully depressed.

The engaging prongs of the comb 18 may be bent by any suitable tool in order to determine the precise point in the travel of the type bar at which the release of the key lever from the remainder of the type action shall take place. 8

The universal bar frame H is actuated by links I connected to the heels of the type bars and having the usual hooks which engage said universal frame. Springs K coiled about these links and attached at their rear end to an anchorage L serve to return the type action to normal position when it is disconnected from the key levers.

Assuming that the parts have moved to the On in:

Figure 2 position, it is obvious that when the key lever is released and allowed to rise, the

oifset hook 5 will engage the rear side of the offset 4 and when it is moved above the latter, it will hook over the same so that the parts will then occupy the position shown in Figure 1.

It is obvious that this construction provides a very simple and efficient means for attaining the desired result and that the action will be given a lighter touch and the type bar permitted to return to normal position with the utmost possible speed. It is apparent that various details of construction may be modified and that the principle of the invention may be embodied in machines of different character and in type actions of other classes without in any way departing from the spirit of the invention which is to be regarded as limited only by the scope of the appended claims.

I claim as my invention:

1. A type action comprising a type bar, a substantially horizontal pivoted sub-lever having a laterally extending hook, a key 1ever positioned adjacent the sublever, a bell crank lever pivoted to the key lever andhaving a laterally extendinghook overlying the hook of the sublever to cause the two levers to move in unison, spring means for holding the bell crank lever in such engaging position, and means engageable by the bell crank lever during the latter portion of the depression of the key lever to rock the bell crank lever and disengage said hooks.

2. In a type action, a type bar, a sub-lever, a front link, connections between the type bar and the front link and between the sub-lever and the front link, a key lever, a latch movably mounted on one lever for normally connecting both levers, and means engageable by said latch during the depression of the key lever for moving said latch to disconnect said levers.

3. In a type action, a type bar, a key lever and a sub-lever pivoted on a common axis a front link, connections between the type bar and the front link and between the sublever and the front link, a key lever, a latch movably mounted on one lever for normally connecting both levers, and means engageable by said latch during the depression of the key lever for moving said latch to dis connect said levers.

In testimony whereof, I have hereunto subscribed my name.

GUSTAVE O. DEGENER. 

